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-rw-r--r--mot-encoder.c638
1 files changed, 638 insertions, 0 deletions
diff --git a/mot-encoder.c b/mot-encoder.c
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+++ b/mot-encoder.c
@@ -0,0 +1,638 @@
+/*
+ Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ MotEncoder.c
+ Generete PAD data for MOT Slideshow and DLS
+
+ Authors:
+ Sergio Sagliocco <sergio.sagliocco@csp.it>
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <wand/magick_wand.h>
+
+#include "lib_crc.h"
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#define MAX(a,b) (((a)>(b))?(a):(b))
+
+#define MAXSEGLEN 8179
+#define MAXDLS 129
+
+typedef unsigned char UCHAR;
+typedef unsigned short int USHORT;
+
+typedef struct {
+ // MSC Data Group Header (extension field not supported)
+ unsigned char extflag; // 1 bit
+ unsigned char crcflag; // 1 bit
+ unsigned char segflag; // 1 bit
+ unsigned char accflag; // 1 bit
+ unsigned char dgtype; // 4 bits
+ unsigned char cindex; // 4 bits
+ unsigned char rindex; // 4 bits
+ /// Session header - Segment field
+ unsigned char last; // 1 bit
+ unsigned short int segnum; // 16 bits
+ // Session header - User access field
+ unsigned char rfa; // 3 bits
+ unsigned char tidflag; // 1 bit
+ unsigned char lenid; // 4 bits - Fixed to value 2 in this implemntation
+ unsigned short int tid; // 16 bits
+ // MSC data group data field
+ // Mot Segmentation header
+ unsigned char rcount; // 3 bits
+ unsigned short int seglen; // 13 bits
+ // Mot segment
+ unsigned char* segdata;
+ // MSC data group CRC
+ unsigned short int crc; // 16 bits
+} MSCDG;
+/*
+ typedef struct {
+// MOT HEADER CUSTOMIZED FOR SLIDESHOW APP
+unsigned int bodysize; // 28 bits
+unsigned short int headsize; // 13 bits
+unsigned char ctype; // 6 bits
+unsigned char sctype; // 9 bits
+unsigned char triggertime[5]; // 0x85 0x00 0x00 0x00 0x00 => NOW
+unsigned char contname[14]; // 0xCC 0x0C 0x00 imgXXXX.jpg
+} MOTSLIDEHDR;
+*/
+int encodeFile (char* fname, int fidx, int padlen);
+void createMotHeader(size_t blobsize, int fidx, char* mothdr, int* mothdrlen);
+void createMscDG(MSCDG* msc, unsigned short int dgtype, unsigned short int cindex, unsigned short int lastseg, unsigned short int tid, unsigned char* data, unsigned short int datalen);
+void packMscDG(unsigned char* mscblob, MSCDG* msc, unsigned short int *bsize);
+void writeMotPAD(unsigned char* mscdg, unsigned short int mscdgsize, unsigned short int padlen);
+void create_dls_datagroup (char* text, int padlen, unsigned char*** p_dlsdg, int* p_numdg);
+void writeDLS(int padlen);
+
+void usage(char* name)
+{
+ fprintf(stderr, "DAB MOT encoder\n"
+ "for slideshow and DLS\n\n"
+ "By CSP Innovazione nelle ICT s.c.a r.l. (http://www.csp.it/)\n\n"
+ "Reads image data from the specified directory, and outputs PAD data\n"
+ "on standard output\n"
+ "Reads DLS from /tmp/dls.file\n");
+ fprintf(stderr, "Usage: %s <dirname>\n", name);
+}
+
+int main (int argc, char *argv[])
+{
+ int len,fidx,ret;
+ struct dirent *pDirent;
+ DIR *pDir;
+ char imagepath[128];
+ char dlstext[MAXDLS],dlstextprev[MAXDLS];
+ int padlen=53;
+
+
+ if (argc < 2) {
+ usage(argv[0]);
+ return 0;
+ }
+
+ MagickWandGenesis();
+
+ fidx=0;
+ while(1) {
+ pDir = opendir (argv[1]);
+ if (pDir == NULL) {
+ printf ("Cannot open directory '%s'\n", argv[1]);
+ return 1;
+ }
+ if (fidx == 9999) fidx=0;
+ while ((pDirent = readdir(pDir)) != NULL) {
+ if (pDirent->d_name[0]!='.') {
+ sprintf (imagepath,"%s/%s",argv[1],pDirent->d_name);
+ ret=encodeFile(imagepath, fidx, padlen);
+ if (ret!=1) {
+ fprintf(stderr,"Error - Cannot encode file %s\n",pDirent->d_name);
+ } else {
+ fidx++;
+ writeDLS(padlen);
+ sleep(10);
+ }
+ }
+ }
+ closedir (pDir);
+ }
+ return 1;
+}
+
+int encodeFile (char* fname, int fidx, int padlen)
+{
+ int fd=0,ret,mothdrlen,nseg,lastseglen,i,last,curseglen;
+ unsigned char mothdr[32];
+ MagickWand *m_wand = NULL;
+ PixelWand *p_wand = NULL;
+ size_t blobsize,height,width;
+ unsigned char *blob = NULL, *curseg = NULL;
+ MagickBooleanType err;
+ MSCDG msc;
+ unsigned char mscblob[8200];
+ unsigned short int mscblobsize;
+ //float aspectRatio;
+
+
+ m_wand = NewMagickWand();
+ p_wand = NewPixelWand();
+ PixelSetColor(p_wand,"black");
+
+ err = MagickReadImage(m_wand,fname);
+ if (err==MagickFalse) {
+ fprintf(stderr,"Error - Unable to load image %s\n",fname);
+ ret=0;
+ goto RETURN;
+ }
+
+ height=MagickGetImageHeight(m_wand);
+ width=MagickGetImageWidth(m_wand);
+ //aspectRatio = (width * 1.0)/height;
+
+ fprintf(stderr,"Image: %s (id=%d). Original size: %d x %d. ",fname,fidx,width,height);
+
+ while (height>240 || width>320) {
+ if (height/240.0 > width/320.0) {
+ //width = height * aspectRatio;
+ width = width * 240.0 / height;
+ height = 240;
+ }
+ else {
+ //height = width * (1.0/aspectRatio);
+ height = height * 320.0 / width;
+ width = 320;
+ }
+ MagickResizeImage(m_wand,width,height,LanczosFilter,1);
+ }
+
+
+
+ height=MagickGetImageHeight(m_wand);
+ width=MagickGetImageWidth(m_wand);
+
+ MagickBorderImage(m_wand,p_wand,(320-width)/2,(240-height)/2);
+
+ MagickSetImageCompressionQuality(m_wand,75);
+ MagickSetImageFormat(m_wand,"jpg");
+ blob=MagickGetImagesBlob(m_wand, &blobsize);
+ fprintf(stderr,"Resized to %d x %d. Size after compression %d bytes\n",width,height,blobsize);
+
+ nseg=blobsize / MAXSEGLEN;
+ lastseglen=blobsize % MAXSEGLEN;
+ if (lastseglen !=0) nseg++;
+
+ createMotHeader(blobsize,fidx,mothdr,&mothdrlen);
+ // Create the MSC Data Group C-Structure
+ createMscDG(&msc,3,0,1,fidx,mothdr,mothdrlen);
+ // Generate the MSC DG frame (Figure 9 en 300 401)
+ packMscDG(mscblob,&msc,&mscblobsize);
+ writeMotPAD(mscblob,mscblobsize,padlen);
+
+ for (i=0;i<nseg;i++) {
+ curseg=blob+i*MAXSEGLEN;
+ if (i==nseg-1) {
+ curseglen=lastseglen;
+ last=1;
+ }
+ else {
+ curseglen=MAXSEGLEN;
+ last=0;
+ }
+
+ createMscDG(&msc,4,i,last,fidx,curseg,curseglen);
+ packMscDG(mscblob,&msc,&mscblobsize);
+ writeMotPAD(mscblob,mscblobsize,padlen);
+ }
+
+ ret=1;
+
+RETURN:
+ if (m_wand) {
+ m_wand = DestroyMagickWand(m_wand);
+ }
+ if (blob) {
+ free(blob);
+ }
+ return ret;
+}
+
+
+void createMotHeader(size_t blobsize, int fidx, char* mothdr,int* mothdrlen)
+{
+ int ret;
+ struct stat s;
+ char MotHeaderCore[7]= {0x00,0x00,0x00,0x00,0x0D,0x04,0x01};
+ char MotHeaderExt[19]= {0x85,0x00,0x00,0x00,0x00,0xcc,0x0c,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+ char cntemp[12];
+ int i;
+
+ MotHeaderCore[0]=(blobsize<<4 & 0xFF000000)>>24;
+ MotHeaderCore[1]=(blobsize<<4 & 0x00FF0000)>>16;
+ MotHeaderCore[2]=(blobsize<<4 & 0x0000FF00)>>8;
+ MotHeaderCore[3]=(blobsize<<4 & 0x000000FF);
+
+ sprintf(cntemp,"img%04d.jpg",fidx);
+ for (i=0; i<sizeof(cntemp); i++) {
+ MotHeaderExt[8+i]=cntemp[i];
+ }
+ *mothdrlen=26;
+ for (i=0;i<7;i++)
+ mothdr[i]=MotHeaderCore[i];
+ for (i=0;i<19;i++)
+ mothdr[7+i]=MotHeaderExt[i];
+
+ return;
+}
+
+void createMscDG(MSCDG* msc, unsigned short int dgtype, unsigned short int cindex, unsigned short int lastseg, unsigned short int tid, unsigned char* data, unsigned short int datalen)
+{
+ msc->extflag=0;
+ msc->crcflag=1;
+ msc->segflag=1;
+ msc->accflag=1;
+ msc->dgtype=dgtype;
+ msc->cindex=cindex;
+ msc->rindex=0;
+ msc->last=lastseg;
+ msc->segnum=cindex;
+ msc->rfa=0;
+ msc->tidflag=1;
+ msc->lenid=2;
+ msc->tid=tid;
+ msc->segdata=data;
+ msc->rcount=0;
+ msc->seglen=datalen;
+
+ return;
+}
+
+
+void packMscDG(unsigned char* b, MSCDG* msc, unsigned short int* bsize) {
+
+ int i;
+ unsigned short int crc=0xFFFF;
+
+ b[0]=(msc->extflag<<7)|(msc->crcflag<<6)|(msc->segflag<<5)|(msc->accflag<<4)|msc->dgtype;
+ b[1]=(msc->cindex<<4)|msc->rindex;
+ b[2]=(msc->last<<7)|((msc->segnum & 0x7F00)>>8);
+ b[3]=msc->segnum & 0x00FF;
+ b[4]=0;
+ b[4]=(msc->rfa<<5)|(msc->tidflag<<4)|msc->lenid;
+ b[5]=(msc->tid & 0xFF00)>>8;
+ b[6]=msc->tid & 0x00FF;
+ b[7]=(msc->rcount<<5)|((msc->seglen & 0x1F00)>>8);
+ b[8]=msc->seglen & 0x00FF;
+
+ for (i=0;i<9;i++)
+ crc = update_crc_ccitt(crc, b[i]);
+
+ for(i=0;i<msc->seglen;i++) {
+ b[i+9]=(msc->segdata)[i];
+ crc = update_crc_ccitt(crc, b[i+9]);
+ }
+
+ crc=~crc;
+ b[9+msc->seglen] = (crc & 0xFF00) >> 8; // HI CRC
+ b[9+msc->seglen+1] = crc & 0x00FF; // LO CRC
+
+ *bsize=9+msc->seglen+1+1;
+
+ //write(1,b,9+msc->seglen+1+1);
+
+}
+
+
+void writeMotPAD(unsigned char* mscdg, unsigned short int mscdgsize, unsigned short int padlen) {
+
+ unsigned char pad[128];
+ int xpadlengthmask,i,j,numseg,lastseglen;
+ unsigned short int crc;
+
+
+ if (padlen==17)
+ xpadlengthmask=3;
+ else if (padlen==21)
+ xpadlengthmask=4;
+ else if (padlen==29)
+ xpadlengthmask=5;
+ else if (padlen==37)
+ xpadlengthmask=6;
+ else if (padlen==53)
+ xpadlengthmask=7;
+
+
+ // Write Data Group Length Indicator
+ crc = 0xffff;
+ pad[padlen-1]=0x02; // FF-PAD Byte L (CI=1)
+ pad[padlen-2]=0x20; // FF-PAD Byte L-1 (Variable size X_PAD)
+ pad[padlen-3]=(xpadlengthmask<<5) | 0x01; // CI => data length = 12 (011) - Application Type=2 (DLS - start of X-PAD data group)
+ pad[padlen-4]=0x00; // End of CI list
+ pad[padlen-5]=(mscdgsize & 0x3F00)>>8; // RFA+HI Data group length
+ pad[padlen-6]=(mscdgsize & 0x00FF);
+ crc = update_crc_ccitt(crc, pad[padlen-5]);
+ crc = update_crc_ccitt(crc, pad[padlen-6]);
+ crc = ~crc;
+ pad[padlen-7]=(crc & 0xFF00) >> 8; // HI CRC
+ pad[padlen-8]=(crc & 0x00FF); // LO CRC
+ for (i=padlen-9;i>=0;i--) { // NULL PADDING
+ pad[i]=0x00;
+ }
+ write(STDOUT_FILENO,pad,padlen);
+ //fprintf(stderr,"Data Group Length Indicator: ");
+ //for (i=0;i<padlen;i++) fprintf(stderr,"%02x ",pad[i]);
+ //fprintf(stderr,"\n");
+
+ // Write MSC Data Groupsd
+ numseg=mscdgsize / (padlen-5);
+ lastseglen=mscdgsize % (padlen-5);
+ if (lastseglen > 0) {
+ numseg++; // The last incomplete segment
+ }
+
+ for (i=0;i<numseg;i++) {
+
+ char* curseg;
+ int curseglen;
+ UCHAR firstseg;
+
+ curseg = &mscdg[i*(padlen-5)];
+ //fprintf(stderr,"Segment number %d\n",i+1);
+
+ if (i==0) // First segment
+ firstseg=1;
+ else
+ firstseg=0;
+
+ if (i==numseg-1) { //Last segment
+ if (lastseglen!=0)
+ curseglen=lastseglen;
+ else
+ curseglen=padlen-5;
+ } else {
+ curseglen=padlen-5;
+ }
+
+ pad[padlen-1]=0x02; // FF-PAD Byte L (CI=1)
+ pad[padlen-2]=0x20; // FF-PAD Byte L-1 (Variable size X_PAD)
+ if (firstseg==1)
+ pad[padlen-3]=(xpadlengthmask<<5) | 12; // CI => data length = 12 (011) - Application Type=12 (start of MOT)
+ else
+ pad[padlen-3]=(xpadlengthmask<<5) | 13; // CI => data length = 12 (011) - Application Type=13 (MOT)
+
+ pad[padlen-4]=0x00; // End of CI list
+
+ for (j=0; j<curseglen; j++)
+ pad[padlen-5-j]=curseg[j];
+ for (j=padlen-5-curseglen;j>=0;j--)
+ pad[j]=0x00;
+
+ write(STDOUT_FILENO,pad,padlen);
+ //fprintf(stderr,"MSC Data Group - Segment %d: ",i);
+ //for (j=0;j<padlen;j++) fprintf(stderr,"%02x ",pad[j]);
+ // fprintf(stderr,"\n");
+
+ }
+}
+
+
+void writeDLS(int padlen) {
+ char dlstext[MAXDLS];
+ static char dlstextprev[MAXDLS];
+ int dlslen,i;
+ static unsigned char** dlsdg;
+ static int numdg=0;
+
+ static int dlsfd=0;
+
+ if (dlsfd!=0) close(dlsfd);
+ dlsfd=open("/tmp/dls.file",O_RDONLY);
+ if (dlsfd==-1) {
+ fprintf(stderr,"Error - Cannot open dls file\n");
+ return;
+ }
+
+ dlslen=read(dlsfd, dlstext, MAXDLS);
+ dlstext[dlslen]=0x00;
+ //if (strcmp(dlstext,dlstextprev)!=0) {
+ create_dls_datagroup(dlstext,padlen,&dlsdg,&numdg);
+ strcpy(dlstextprev,dlstext);
+ //}
+ for (i=0;i<numdg;i++) {
+ write(STDOUT_FILENO,dlsdg[i],padlen);
+ }
+
+}
+
+void create_dls_datagroup (char* text, int padlen, UCHAR*** p_dlsdg, int* p_numdg) {
+
+ UCHAR dlsseg[8][16]; // max 8 segments, each max 16 chars
+ UCHAR** dlsdg; // Array od datagroups composing dls text;
+
+
+ int numseg; // Number of DSL segments
+ int lastseglen; // Length of the last segment
+ int numdg; // Number of data group
+ int xpadlengthmask;
+ int i,j,k,z,idx_start_crc,idx_stop_crc;
+ USHORT dlscrc;
+ static UCHAR toggle=0;
+
+ if (toggle==0)
+ toggle=1;
+ else
+ toggle=0;
+
+ numseg=strlen(text) / 16;
+ lastseglen=strlen(text) % 16;
+ if (padlen-9 >= 16) {
+ if (lastseglen > 0) numseg++; // The last incomplete segment
+ numdg=numseg; // The PAD can contain the full segmnet and overhead (9 bytes)
+ } else {
+ numdg=numseg*2; // Each 16 char segment span over 2 dg
+ if (lastseglen > 0) {
+ numseg++; // The last incomplete segment
+ if (lastseglen <= padlen-9)
+ numdg+=1;
+ else
+ numdg+=2;
+
+ }
+ }
+ *p_numdg=numdg;
+ fprintf(stderr,"PAD Length: %d\n",padlen);
+ fprintf(stderr,"DLS text: %s\n",text);
+ fprintf(stderr,"Number od DLS segments: %d\n",numseg);
+ fprintf(stderr,"Number od DLS data grupus: %d\n",numdg);
+
+ if (padlen==17)
+ xpadlengthmask=3;
+ else if (padlen==21)
+ xpadlengthmask=4;
+ else if (padlen==29)
+ xpadlengthmask=5;
+ else if (padlen==37)
+ xpadlengthmask=6;
+ else if (padlen==53)
+ xpadlengthmask=7;
+
+ *p_dlsdg = (UCHAR**) malloc(numdg*sizeof(UCHAR*));
+ dlsdg=*p_dlsdg;
+
+ i=0;
+ for (z=0;z<numseg;z++) {
+
+ char* curseg;
+ int curseglen;
+ UCHAR firstseg,lastseg;
+
+ curseg = &text[z*16];
+ fprintf(stderr,"Segment number %d\n",z+1);
+
+ if (z==0) // First segment
+ firstseg=1;
+ else
+ firstseg=0;
+
+ if (z==numseg-1) { //Last segment
+ if (lastseglen!=0)
+ curseglen=lastseglen;
+ else
+ curseglen=16;
+ lastseg=1;
+ } else {
+ curseglen=16;
+ lastseg=0;
+ }
+
+ if (curseglen<=padlen-9) { // Segment is composed by 1 data group
+ dlsdg[i]=(UCHAR*) malloc(padlen*sizeof(UCHAR));
+ dlsdg[i][padlen-1]=0x02; // FF-PAD Byte L (CI=1)
+ dlsdg[i][padlen-2]=0x20; // FF-PAD Byte L-1 (Variable size X_PAD)
+ dlsdg[i][padlen-3]=(xpadlengthmask<<5) | 0x02; // CI => data length = 12 (011) - Application Type=2 (DLS - start of X-PAD data group)
+ dlsdg[i][padlen-4]=0x00; // End of CI list
+
+ dlsdg[i][padlen-5]=((toggle*8+firstseg*4+lastseg*2+0)<<4) | (curseglen-1); // DLS Prefix (T=1,Only one segment,segment length-1)
+
+ if (firstseg==1)
+ dlsdg[i][padlen-6]=0x00; // DLS Prefix (Charset standard)
+ else
+ dlsdg[i][padlen-6]=z<<4; // DLS SegNum
+
+ idx_start_crc = padlen-5; // CRC start from prefix
+ for (j=0;j<curseglen;j++) { // DLS text
+ dlsdg[i][padlen-7-j]=curseg[j];
+ }
+
+ idx_stop_crc = padlen-7-curseglen+1;
+
+ dlscrc = 0xffff;
+ for (j=idx_start_crc;j>=idx_stop_crc;j--) {
+ dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][j]);
+ }
+
+ dlscrc = ~dlscrc;
+ fprintf(stderr,"crc=%x ~crc=%x\n",~dlscrc,dlscrc);
+
+ dlsdg[i][padlen-7-curseglen] = (dlscrc & 0xFF00) >> 8; // HI CRC
+ dlsdg[i][padlen-7-curseglen-1] = dlscrc & 0x00FF; // LO CRC
+
+ for (j=padlen-7-curseglen-2;j>=0;j--) { // NULL PADDING
+ dlsdg[i][j]=0x00;
+ }
+ fprintf(stderr,"Data group: ");
+ for (j=0;j<padlen;j++) fprintf(stderr,"%x ",dlsdg[i][j]);
+ fprintf(stderr,"\n");
+ i++;
+
+ } else { // Segment is composed by 2 data groups
+
+ // FIRST DG (NO CRC)
+ dlscrc = 0xffff;
+
+ dlsdg[i]=(UCHAR*) malloc(padlen*sizeof(UCHAR));
+ dlsdg[i][padlen-1]=0x02; // FF-PAD Byte L (CI=1)
+ dlsdg[i][padlen-2]=0x20; // FF-PAD Byte L-1 (Variable size X_PAD)
+ dlsdg[i][padlen-3]=(xpadlengthmask<<5) | 0x02; // CI => data length = 12 (011) - Application Type=2 (DLS - start of X-PAD data group)
+ dlsdg[i][padlen-4]=0x00; // End of CI list
+ dlsdg[i][padlen-5]=((toggle*8+firstseg*4+lastseg*2+0)<<4) | (curseglen-1); // DLS Prefix (T=1,Only one segment,segment length-1)
+
+ if (firstseg==1)
+ dlsdg[i][padlen-6]=0x00; // DLS Prefix (Charset standard)
+ else
+ dlsdg[i][padlen-6]=(i-1)<<4; // DLS SegNum
+
+ dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-5]);
+ dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-6]);
+
+ for (j=0;j < MIN(curseglen,padlen-7); j++) { // DLS text
+ dlsdg[i][padlen-7-j]=curseg[j];
+ dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-7-j]);
+ }
+ k=j;
+ if (curseglen==padlen-8) { // end of segment
+ dlscrc = ~dlscrc;
+ dlsdg[i][1] = (dlscrc & 0xFF00) >> 8; // HI CRC
+ fprintf(stderr,"crc=%x ~crc=%x\n",~dlscrc,dlscrc);
+ } else if (curseglen==padlen-7) {
+ dlscrc = ~dlscrc;
+ fprintf(stderr,"crc=%x ~crc=%x\n",~dlscrc,dlscrc);
+ }
+ dlsdg[i][0]=0x00;
+
+ fprintf(stderr,"First Data group: ");
+ for (j=0;j<padlen;j++) fprintf(stderr,"%x ",dlsdg[i][j]);
+ fprintf(stderr,"\n");
+
+ // SECOND DG (NO CI, NO PREFIX)
+ i++;
+
+ dlsdg[i]=(UCHAR*) malloc(padlen*sizeof(UCHAR));
+ dlsdg[i][padlen-1]=0x00; // FF-PAD Byte L (CI=0)
+ dlsdg[i][padlen-2]=0x20; // FF-PAD Byte L-1 (Variable size X_PAD)
+ if (curseglen==padlen-8) {
+ dlsdg[i][padlen-3] = dlscrc & 0x00FF; // LO CRC
+ } else if (curseglen==padlen-7) {
+ dlsdg[i][padlen-3] = (dlscrc & 0xFF00) >> 8; // HI CRC
+ dlsdg[i][padlen-4] = dlscrc & 0x00FF; // LO CRC
+ } else {
+ for (j=0;j < curseglen-k; j++) { // DLS text
+ dlsdg[i][padlen-3-j]=curseg[k+j];
+ dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-3-j]);
+ }
+ dlscrc = ~dlscrc;
+ dlsdg[i][padlen-3-curseglen+k]=(dlscrc & 0xFF00) >> 8; // HI CRC
+ dlsdg[i][padlen-3-curseglen+k-1]=dlscrc & 0x00FF; // LO CRC
+ }
+
+ fprintf(stderr,"Second Data group: ");
+ for (j=0;j<padlen;j++) fprintf(stderr,"%x ",dlsdg[i][j]);
+ fprintf(stderr,"\n");
+ fprintf(stderr,"**** crc=%x ~crc=%x\n",~dlscrc,dlscrc);
+ i++;
+ }
+
+ }
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-21 23:12:16 +0000